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太阳系会回复它原本的美丽。
The solar system is to regain its original beauty.
youdao
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推导出二种座标系下有用回复能表达式；
The expressions of usefulrecoil energy in two coordinate systems are derived.
youdao
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推导出二种座标系下有用回复能表达式；
The expressions of usefulrecoil energy in two coordinate systems are derived.
youdao